Chemistry 1 Help Please. Multiple Choice

1. Using Density to find Volume: Cobalt is a hard magnetic metal that resembles iron in appearance. It has a density of 8.90 g/cm3. What volume would 17.8 grams of cobalt have? (Hint: V= m/D )
a. 2.00 cm3
b. 0.50 cm3
c. 0.20 cm3
d. 5.00 cm3


2. The proton and neutron are
a. The same mass as electrons
b. Negatively charged particles
c. Essentially equal in mass
d. None of the above


3. What is a chemical change?
a. A rearrangement of atoms and/or molecules to produce one or more new substances with new properties
b. A change in which the same substance is present before and after the change
c. A change that is unstable
d. All of the above


4. An electron is
a. A positively charged particle with a very small mass
b. A positively charged particle with a very large mass
c. A negatively charged particle with a very large mass
d. A negatively charged particle with a very small mass


5. Kinetic Energy can be defined as:
a. The energy possessed by an object because of its motion
b. A property possessed by very few matters
c. Energy depending upon the position of the object with respect to some reference point
d. Energy being transferred by electromagnetic waves


6. Because properties of elements are based on electron configurations, many of these properties are
a. Unpredictable and repeat in periodic patterns
b. Predictable and do not repeat in periodic patterns
c. Predictable and repeat in periodic patterns
d. None of the above


7. A chemical equation
a. Cannot calculate the amount of heat absorbed or given off in the chemical reaction of a specific amount of substance
b. Represents changes that take place in a reaction
c. Does not show any amount of reactants or products
d. B and D only


8. Calculating Density: A piece of beeswax with a volume of 8.50 cm3 is found to have a mass of 8.06 grams. What is the density of the beeswax? ( Hint: D= m/V )